Describe one experiment you would perform to demonstrate the phenomena that the germinating seeds give out Carbon dioxide.

Aim — Experiment demonstrating the fact that germinating seeds produce Carbon dioxide.

Procedure —

1. Name two thermo flasks as ‘A’ and ‘B’, keep them aside.
2. At the base of both the flasks, place wet cotton wool.
3. In flask A, take a few soaked seeds of pea, simultaneously take equal quantity of boiled seeds in flask B.
4. To flask B, add some carbolic acid so as to inhibit bacterial growth on the dead seeds.
5. Seal the flasks with a cork, leave them undisturbed for a couple of days.
6. Observe the changes.

Inference —

1. Post few days, germination of seeds in flask A is observed.
2. Flask B shows no signs of seed germination.
3. Cork is removed to test the gases in each of the flasks. The flask is toppled over a test tube which carries limewater. The test tube is then shaken up.
4. Indication of carbon dioxide as expected in flask A is observed when lime water turns milky, thereby depicting that germinating seeds produce carbon dioxide.
5. The gas in the flask B shows no effect upon coming in contact with limewater, indicating absence of carbon dioxide.